Journal
SENSORS
Volume 19, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/s19081749
Keywords
surface acoustic wave (SAW); finite element method (FEM); sensitivity; IrO2; ZnO
Funding
- Veterans Affairs Merit Review grant [BX003413]
- Research Career Scientist Awards [IK6BX004212, IK6 BX003778]
- Department of Veterans A ff airs, Veterans Health Administration, Office of Research and Development
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The most vital step in the development of novel and existing surface acoustic wave (SAW)-based sensors and transducers is their design and optimization. Demand for SAW devices has been steadily increasing due to their low cost, portability, and versatility in electronics, telecommunications, and biosensor applications. However, a full characterization of surface acoustic wave biosensors in a three-dimensional (3D) finite element model has not yet been developed. In this study, a novel approach is developed for analyzing shear horizontal Love wave resonator devices. The developed modeling methodology was verified using fabricated devices. A thorough analysis of the 3D model and the experimental device was performed in this study including scattering parameters (S-parameters), reflection coefficient parameters, transmission parameters, and phase velocity. The simulated results will be used as a design guideline for future device design and optimization, which has thus far resulted in close matching between prediction and experimental results. This manuscript is the first to demonstrate a 3D finite element model to correlate the sensitivity of the SAW device with the magnitude of the phase shift, the real and imaginary part of the response, insertion loss, and the frequency shift. The results show that the imaginary part of the response shift has a higher sensitivity compared to other parameters.
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